Engagement terminals for DC power pack and copressor

ABSTRACT

A power pack is engaged with a compressor by engaging a U-shaped frame with two grooves in two respective rails on the compressor. The power pack includes a first terminal and two first clamping plates, and the compressor includes a second terminal and two second clamping plates. The first terminal is clamped between the two second clamping plates and the second terminal is clamped between the two first clamping plates. The power pack includes a detecting pad for detecting the temperature of the power pack so that the user knows abnormal situation when using the power pack.

FIELD OF THE INVENTION

The present invention relates to engagement terminals of a DC power packand a compressor.

BACKGROUND OF THE INVENTION

A conventional DC power pack 90 is disclosed in FIG. 5 and generallyincludes a casing 91 in which rechargeable batteries are received and aconnection frame 92 is connected to a surface of the casing 91 of thepack 90. Three first terminals 93 electrically connected to therechargeable batteries extend through the casing 91 so as to be engagedwith the second terminals 95 on a compressor 94 as shown in FIG. 6. Inorder to engage with the first terminals 93 of the pack 90, the secondterminals 95 are made to be pockets so as to accommodate the firstterminals 93. Nevertheless, the first terminals 93 are deformed afterbeing used for a period of time and a gap is defined between the secondterminals 95 and the first terminals 93. In other words, the contactarea is reduced and the less the contact area is, the higher theresistance produces, so that too much of electric energy becomes heatwhich is dispensed and wasted.

The present invention intends to provide engagement terminals on thepower pack and the compressor so that the terminals are securely engagedwith each other and the wasted heat is reduced.

SUMMARY OF THE INVENTION

The present invention relates to a power pack which includes a casingand a U-shaped frame is connected on a surface of the casing so as to beconnected to two rails on a compressor. A first terminal and two firstclamping plates extend from the surface of the casing and are locatedbetween two extensions of the U-shaped frame. A detecting pad is locatedon the surface of the casing and between the first terminal and thefirst clamping plates.

Each rail has a groove so that the two extensions of the U-shaped frameare engaged with the two grooves. The compressor includes a secondterminal and two second clamping plates, wherein the first terminal isclamped between the two second clamping plates and the second terminalis clamped between the two first clamping plates.

The present invention will become more obvious from the followingdescription when taken in connection with the accompanying drawingswhich show, for purposes of illustration only, a preferred embodiment inaccordance with the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is an exploded view to show the power pack and the compressor ofthe present invention;

FIG. 2 is a perspective view to show the power pack of the presentinvention;

FIG. 3 is a cross sectional view to show the terminal and the clampingplates of the power pack are engaged with the terminal and the clampingplates on the compressor;

FIG. 4 shows a plane view to show the terminal and the clamping platesof the power pack are engaged with the terminal and the clamping plateson the compressor;

FIG. 5 is a perspective view to show a conventional power pack;

FIG. 6 is a plane view to show the connection of the terminals on theconventional power pack and on the compressor, and

FIG. 7 shows that one of the terminals on the conventional power pack isengaged with the pocket-like terminal on the compressor.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

Referring to FIGS. 1 to 4, the power pack 1 of the present inventioncomprises a casing 10 in which a rechargeable battery (not shown) isreceived and a U-shaped frame 11 is connected on a surface of the casing10. The U-shaped frame 11 includes a thin first extension 111 and athick second extension 112. A first terminal 12 and two first clampingplates 13 are electrically connected to the battery and extend from thesurface of the casing 10. The first terminal 12 and two first clampingplates 13 are located between the first and second extensions 111, 112of the U-shaped frame 11. A detecting pad 14 is located on the surfaceof the casing 10 and between the first terminal 12 and the firstclamping plates 13.

The compressor 2 of the present invention comprises an engaging device20 comprising a first rail and a second rail. The first rail has a firstgroove 201 and the second rail has a second groove 202, wherein the tworespective grooves 201 and 202 are sized to be correspondent to the thinfirst extension 111 and the thick second extension 112. The thin firstextension 111 can be slidably engaged with the first groove 201, and thethick second extension 112 can be slidably engaged with the secondgroove 202. A second terminal 22 and two second clamping plates 21extend from a surface of the compressor 2 and located between the tworails. The first terminal 12 is clamped between the two second clampingplates 21 and the second terminal 22 is clamped between the two firstclamping plates 13.

The contact area between the first terminal 12 and the two secondclamping plates 21, and between the second terminal 22 and the two firstclamping plates 13 are large enough, and the first terminal 12 and thesecond terminal 22 are securely clamped so that no gap is definedbetween the clamping plates 13/21 and the two terminals 12/22. Thedetecting pad 14 detects the temperature of the power pack 1 and isconnected to a warning light which is not shown so that any abnormalsituation can be noticed by the user.

While we have shown and described the embodiment in accordance with thepresent invention, it should be clear to those skilled in the art thatfurther embodiments may be made without departing from the scope of thepresent invention.

1. A combination of a power pack and a compressor, the power packcomprising a casing and a U-shaped frame connected on a surface of thecasing, a first terminal and two first clamping plates extending fromthe surface of the casing and located between two extensions of theU-shaped frame, a detecting pad located on the surface of the casing andbetween the first terminal and the first clamping plates, and thecompressor comprising two rails and each rail having a groove so thatthe two extensions of the U-shaped frame are engaged with the twogrooves, a second terminal and two second clamping plates extending froma surface of the compressor and located between the two rails, the firstterminal being clamped between the two second clamping plates and thesecond terminal being clamped between the two first clamping plates. 2.The combination as claimed in claim 1, wherein the two extensions of theU-shaped frame includes a thin first extension and a thick secondextension, the two respective grooves of the two rails are sized to becorrespondent to the thin first extension and the thick secondextension.